Security key. This is the key that authenticates communication between the master and the peers and search heads. The key must be the same across all cluster nodes. Set the same value here that you previously set on the master node.

6. Click Enable search head node.

The message appears, "You must restart Splunk for the search node to become active. You can restart Splunk from Server Controls."

7. Click Go to Server Controls. This takes you to the Settings page where you can initiate the restart.

Next steps

Now that you have enabled the search head, you can:

View the search head dashboard

Allow the search head to search other clusters

Add search heads to the cluster

Perform additional configuration on the search head

View the search head dashboard

After the restart, log back into the search head and return to the Clustering page in Splunk Web. This time, you see the search head's clustering dashboard. See "View the search head dashboard" for more information.

Allow the search head to search multiple clusters

Add search heads to an indexer cluster

You can set up multiple search heads to accommodate more simultaneous searches. For information on how to determine your search head needs, see "Hardware capacity planning" in the Capacity Planning manual.

If you want to set up more search heads for an indexer cluster, just repeat the enablement procedure for additional instances. If you want to deploy a search head cluster, so that the search heads share configurations and jobs, see the additional configuration instructions in the topic "Integrate the search head cluster with an indexer cluster" in the Distributed Search manual.

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